From 88a3dd68f5b31b14befee5a73de86d12bd415f90 Mon Sep 17 00:00:00 2001
From: Serg <serg.zhukovsky@gmail.com>
Date: Wed, 18 Feb 2026 00:59:01 -0500
Subject: [PATCH] Fix BodySnifferURLLoader::Cancel() crash on invalid WeakPtr
 dereference (#34003)

Add a null check for throttle_ before dereferencing in Cancel(),
consistent with existing guards in OnComplete() and CompleteSniffing().

Resolves: https://github.com/brave/brave-browser/issues/52931
---
 components/body_sniffer/body_sniffer_url_loader.cc | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/components/body_sniffer/body_sniffer_url_loader.cc b/components/body_sniffer/body_sniffer_url_loader.cc
index c680b67e418..261ac78bfb6 100644
--- a/components/body_sniffer/body_sniffer_url_loader.cc
+++ b/components/body_sniffer/body_sniffer_url_loader.cc
@@ -450,6 +450,10 @@ void BodySnifferURLLoader::ForwardBodyToClient() {
 }
 
 void BodySnifferURLLoader::Cancel() {
+  if (!throttle_) {
+    Abort();
+    return;
+  }
   throttle_->Cancel();
 }